Image processing method and related image processing system

Abstract

An image processing method includes the steps of: receiving a plurality of original image signals from an image sensor; modifying the plurality of original image signals based on a lens pattern, to generate a plurality of first image signals; obtaining compensation information of the plurality of first image signals; determining whether the plurality of first image signals match with a predetermined image pattern; modifying the plurality of first image signals according to the compensation information to generate a plurality of second image signals when the plurality of first image signals are determined to not match with the predetermined image pattern; and determining whether the plurality of second image signals match with the predetermined image pattern.

What is claimed is: 
     
         1 . An image processing method, comprising:
 receiving a plurality of original image signals from an image sensor;   modifying the plurality of original image signals based on a lens pattern, to generate a plurality of first image signals;   obtaining compensation information of the plurality of first image signals;   determining whether the plurality of first image signals match with a predetermined image pattern;   modifying the plurality of first image signals according to the compensation information to generate a plurality of second image signals when the plurality of first image signals are determined to not match with the predetermined image pattern; and   determining whether the plurality of second image signals match with the predetermined image pattern.   
     
     
         2 . The image processing method of  claim 1 , wherein the compensation information comprises at least one of offset information and gain information. 
     
     
         3 . The image processing method of  claim 1 , wherein the step of modifying the plurality of first image signals according to the compensation information to generate the plurality of second image signals comprises:
 removing a minimum offset of the plurality of first image signals from each of the plurality of first image signals; and   amplifying the plurality of first image signals to allow a maximum amplitude of the plurality of first image signals to conform to a full scale of a processing circuit for the plurality of first image signals.   
     
     
         4 . The image processing method of  claim 3 , wherein the full scale is an operating voltage range of an analog to digital converter. 
     
     
         5 . The image processing method of  claim 1 , wherein the step of modifying the plurality of original image signals based on the lens pattern to generate the plurality of first image signals comprises:
 modifying a level of the plurality of original image signals by controlling light intensity corresponding to each of the plurality of original image signals, to generate the plurality of first image signals.   
     
     
         6 . The image processing method of  claim 1 , wherein the step of modifying the plurality of original image signals based on the lens pattern to generate the plurality of first image signals comprises:
 modifying a level of the plurality of original image signals in an analog circuit by referring to a gain table corresponding to a pixel position of the plurality of original image signals, to generate the plurality of first image signals.   
     
     
         7 . The image processing method of  claim 1 , wherein each of the plurality of first image signals is generated by compensating relative illumination corresponding to a distance of a corresponding sensing pixel from the center of a lens. 
     
     
         8 . An image processing system, comprising:
 an image processor, configured to perform the following steps:
 receiving a plurality of original image signals from an image sensor; 
 modifying the plurality of original image signals based on a lens pattern, to generate a plurality of first image signals; and 
 obtaining compensation information of the plurality of first image signals; 
   a host, coupled to the image processor, configured to perform the following step:
 determining whether the plurality of first image signals match with a predetermined image pattern; 
   wherein the image processor is further configured to modify the plurality of first image signals according to the compensation information to generate a plurality of second image signals when the plurality of first image signals are determined to not match with the predetermined image pattern; and   wherein the host is further configured to determine whether the plurality of second image signals match with the predetermined image pattern.   
     
     
         9 . The image processing system of  claim 8 , wherein the compensation information comprises at least one of offset information and gain information. 
     
     
         10 . The image processing system of  claim 8 , wherein the image processor is configured to perform the following steps to modify the plurality of first image signals according to the compensation information to generate the plurality of second image signals:
 removing a minimum offset of the plurality of first image signals from each of the plurality of first image signals; and   amplifying the plurality of first image signals to allow a maximum amplitude of the plurality of first image signals to conform to a full scale of a processing circuit of the image processor.   
     
     
         11 . The image processing system of  claim 10 , wherein the full scale is an operating voltage range of an analog to digital converter. 
     
     
         12 . The image processing system of  claim 8 , wherein the image processor is configured to perform the following step to modify the plurality of original image signals based on the lens pattern to generate the plurality of first image signals:
 modifying a level of the plurality of original image signals by controlling light intensity corresponding to each of the plurality of original image signals, to generate the plurality of first image signals.   
     
     
         13 . The image processing system of  claim 8 , wherein the image processor is configured to perform the following step to modify the plurality of original image signals based on the lens pattern to generate the plurality of first image signals:
 modifying a level of the plurality of original image signals in an analog circuit by referring to a gain table corresponding to a pixel position of the plurality of original image signals, to generate the plurality of first image signals.   
     
     
         14 . The image processing system of  claim 8 , wherein each of the plurality of first image signals is generated by compensating relative illumination corresponding to a distance of a corresponding sensing pixel from the center of a lens.